The magazine Sports Illustrated named American tennis player Serena Williams the 2015 Sportsperson of the Year. Williams is the first woman to receive the honor since 1983. #Serena trended on Twitter worldwide. “Serena Williams” was the third-most popular search topic on Google today in the United States. Williams’ fans tweeted their approval of the sports magazine’s choice. But some were unhappy with the decision to give Williams the honor. They believed the racehorse American Pharaoh should have won. The horse had won the “people’s choice” poll by Sports Illustrated. American Pharaoh won the 2015 Triple Crown in American horseracing. He also won the Breeders’ Cup Classic. In doing so, he completed the 'Grand Slam' of American horseracing. Twitter users pointed out while American Pharoah won a Grand Slam, Serena Williams fell short. She won the Australian Open, French Open and Wimbledon, but lost in the semifinal at the U.S. Open in September.